ABB OMD800, Инструкция по установке и эксплуатации

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AUTOM ATIC CONTROL U N IT, OM D8 0 0
5.2.3 OMD800 outputs
5.2.3.1 Opening/closing command to change-over switches, X21 (DO1-DO2)
and X22 (DO3)
These outputs command the change-over switch to open and close Switch I or Switch II.
To guarantee the highest-level safety OMD800 monitors the correct operation of the change-over
switch after a command has been sent. If the feedback of the switch status is not received within
3 seconds of the sending of the command, the device considers it as a failed command and operates
as follows:
An alarm is generated: DO6 and DO9 activate.
Alarm LED is blinking and the alarm is written to Alarm/Event Log
Alarm is set off by pushing the AUTO key. After that the device is always in the Manual Mode to
prevent unwanted operation of the change-over switch.
Exactly the same operations are performed on the secondary line (LN2-Switch II) during the back
switching sequence.
5.2.3.2 Gen-Set start/stop, X23 (DO5)
Gen-Set start and stop is handled by a bistable relay. When the relay contact Start (X23:1) is closed, the
generator is started. When the relay contact Stop (X23:3) is closed, the generator is stopped.
5.2.3.3 Connect/disconnect command to secondary loads, X24 (DO11)
See Secondary Load parameter, Section 7.2.2.3.
5.2.3.4 Programmable digital outputs, X29 (DO6-DO10 and DO12)
These outputs can be configured by the user. User can choose the function and the contact type for
each of these outputs. For configuration see Section 7.2.2.3. Default configuration is shown in
Section 5.2.2, Table 5.1.
5.2.4 OMD800 inputs
5.2.4.1 Switch status input, X31:2 (DI1), X31:3 (DI2)
These two inputs are connected to change-over switch auxiliary contacts. Input X31:2 (DI1) is
connected to LN1-Switch I and input X31:3 (DI2) is connected to LN2-Switch II (Switch I / II open = input
inactive, Switch I / II closed = input active). Auxiliary contacts are in-built in motorized
OTM40…125_CMA_. If OMD800 is used with motorized OTM160…2500_CM_, use always type OA1G10
auxiliary contacts with DI1 and DI2. See the wiring diagrams on Figure 5.1 and Figure 5.2.
5.2.4.2 Force manual, X31:1 (DI3)
When the handle is attached this input is closed and OMD800 is forced to Manual Mode. To set the
OMD800 back to the Automatic Mode the handle must be removed and the AUTO key pushed (Auto LED
is ON).
5.2.4.3 Programmable digital inputs, X32 (DI4…DI11)
These inputs can be configured by the user. User can choose function and contact type for each of
these inputs. For configuration, see Section 7.2.2.4. Default configuration is shown in Section 5.2.2,
Table 5.1.